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WikiPedia: Nitrosamin http://margotbworldnews.com/News/Apr/Apr22/nitrosa... http://www.chemistry.ccsu.edu/glagovich/teaching/3... //pubmed.ncbi.nlm.nih.gov/15672455 http://www.healthnz.co.nz/ECigsExhaledSmoke.htm //doi.org/10.1002%2Fmnfr.200400050 https://web.archive.org/web/20130305171538/http://... https://web.archive.org/web/20151228144752/http://...